A duvet is a type of flat blanket filled with down or feathers, most closely related to a comforter. While a duvet can be purely decorative, it can also be quite functional. Duvets can be useful to keep you warm during the changing climate throughout the year. A duvet's toggle or warmth rating lets you know for which season your cover will be suitable; the higher the tog rating, the warmer the cover.
Cool Season Duvets
During the late fall and winter months, the temperature will drop and heating costs will rise. To help offset your home heating bill, use a warm duvet. Duvets with a tog rating of 12 to 13.5 will work best for this task as they provide the most warmth. Keep in mind, if you live in a milder climate a duvet with this rating may be too warm to give you the most comfort. If your house stays cooler, a duvet with a higher rating will keep you warm and cosy as the temperature drops.
Warm Season Duvets
During the spring and summer months, the temperature will rise but the nighttime often stays cool. A duvet with a rating of 3 to 4.5 will best suit your needs if you do not get cool during the night. If you prefer to sleep warmer, a rating of 6 might better fit your style since it will provide warmth without being too heavy for the warmer months of the year. Remember, the higher the rating, the warmer you will feel.
Medium Season Duvets
As fall begins, the temperature often drops but not drastically. While you may need more warmth than you did during the spring, it may not be time to bring out a higher tog duvet. The perfect fit for your needs as the weather cools is a 9 to 0.5 tog rating duvet; this will keep you warm and cosy without making you too hot to sleep.
All Season Duvets
Duvets also come in combination sets with two separate tog ratings; the two covers snap or button together to form a higher tog rating and can be separated to fit your current climate conditions. Often these duvets are rated a 13.5 because one cover is rated a 4.5 and the other a 9. This can often be your best option as one can be used for warmer months, the other as the weather drops and they can be combined for use in the middle of winter.